Quasicrystal structure is a kind of quasiperiodic spatial tessellation formed by several kinds of tiles. Compared with periodic or other aperiodic tiling, it shows superiorities but also drawbacks when used for generative design. It can generate attractive and irregular novel forms with controllable cost for construction, but its strict rules restrict its variety. To cover the disadvantages of these tessellations without diminishing their advantages, a new kind of spatial tessellation, named as Periodic-to-Aperiodic (P-A) Tiling is proposed in this paper with a series of installation design cases, inspired by the primary principles and architectural applications of quasicrystal structure.